Your banner stretches across the top of your artist page and reshapes itself as the screen size changes. The image stays centered as it scales, so anything important should sit in the middle.
Size: Upload at 3840 × 800 pixels (a 4.8:1 ratio). Smaller sizes work too as long as you keep the same ratio — for example, 1920 × 400 or 2400 × 500.
Safe zone: Keep your main subject within the center 1760 × 800 pixels (a 2.2:1 ratio). The sides get cropped on smaller screens.
Skip the text: Banners look best as pure image. Your artist name is already overlaid by the platform.
Note: The square artist image in your sidebar is a separate element. The two scale independently, so don't design a composition meant to flow between them.